- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄45218 > MC68HSC05C8CFN (FREESCALE SEMICONDUCTOR INC) 8-BIT, MROM, 4.1 MHz, MICROCONTROLLER, PQCC44 PDF資料下載
參數(shù)資料
| 型號： | MC68HSC05C8CFN |
| 廠商： | FREESCALE SEMICONDUCTOR INC |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-BIT, MROM, 4.1 MHz, MICROCONTROLLER, PQCC44 |
| 封裝： | PLASTIC, LCC-44 |
| 文件頁數(shù)： | 44/116頁 |
| 文件大?。?/td> | 781K |
| 代理商： | MC68HSC05C8CFN |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁當(dāng)前第44頁第45頁第46頁第47頁第48頁第49頁第50頁第51頁第52頁第53頁第54頁第55頁第56頁第57頁第58頁第59頁第60頁第61頁第62頁第63頁第64頁第65頁第66頁第67頁第68頁第69頁第70頁第71頁第72頁第73頁第74頁第75頁第76頁第77頁第78頁第79頁第80頁第81頁第82頁第83頁第84頁第85頁第86頁第87頁第88頁第89頁第90頁第91頁第92頁第93頁第94頁第95頁第96頁第97頁第98頁第99頁第100頁第101頁第102頁第103頁第104頁第105頁第106頁第107頁第108頁第109頁第110頁第111頁第112頁第113頁第114頁第115頁第116頁
MC68HC05C8A MC68HCL05C8A MC68HSC05C8A Data Sheet, Rev. 5.1
Freescale Semiconductor
33
Chapter 5
Resets
5.1 Introduction
The microcontroller unit (MCU) can be reset three ways:
1.
Initial power-on reset function
2.
Active low input to the RESET pin
3.
Computer operating properly (COP) reset
5.2 Power-On Reset (POR)
An internal reset is generated on power-up to allow the internal clock generator to stabilize. The power-on
reset is strictly for power turn-on conditions and should not be used to detect a drop in the power supply
voltage. There is a 4064 internal processor clock cycle (tCYC) oscillator stabilization delay after the
oscillator becomes active. If the RESET pin is low after the end of this 4064-cycle delay, the MCU will
remain in the reset condition until RESET goes high.
For additional information, refer to Figure 13-8. Power-On Reset Timing Diagram.
5.3 RESET Pin
The MCU is reset when a logic 0 is applied to the RESET input for a period of one and one-half machine
cycles (tRL).
5.4 Computer Operating Properly (COP) Reset
This device includes a watchdog COP feature as a mask option. The COP is implemented with an 18-bit
ripple counter. This provides a timeout period of 64 milliseconds at a bus rate of 2 MHz. If the COP should
time out, a system reset will occur and the device will be re-initialized in the same fashion as a power-on
reset (POR) or external reset.
5.4.1 Resetting the COP
Preventing a COP reset is done by writing a logic 0 to the COPC bit. This action will reset the counter and
begin the timeout period again. The COPC bit is bit 0 of address $1FF0. A read of address $1FF0 will
result in the user defined ROM data at that location.
5.4.2 COP During Wait Mode
The COP will continue to operate normally during wait mode. The software should pull the device out of
wait mode periodically and reset the COP by writing to the COPC bit to prevent a COP reset.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MC68HSC05C8CFB | 8-BIT, MROM, 4.1 MHz, MICROCONTROLLER, PQFP44 |
| MC68HC05C8APE | 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PDIP40 |
| MC68HC05C8AMB | 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PDIP42 |
| MC68HCL05C8AFN | 8-BIT, MROM, MICROCONTROLLER, PQCC44 |
| MC68HSC05C8AFB | 8-BIT, MROM, 4.1 MHz, MICROCONTROLLER, PQFP44 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MC68HSC705C8ACFB | 制造商:Rochester Electronics LLC 功能描述:8 BIT MCU, 304 BYTES RAM - Bulk |
| MC68HSC705C8ACP | 制造商:Rochester Electronics LLC 功能描述: 制造商:Freescale Semiconductor 功能描述: |
| MC68HSC705C8ACS | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| MC68HSC705J1ACDW | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| MC68HSC705J1ACP | 制造商:Rochester Electronics LLC 功能描述:8 BIT MCU, 64 BYTES RAM - Bulk |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。